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/* See LICENSE file for copyright and license details. */
#include <linux/vt.h>
#include <sys/ioctl.h>
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static char *argv0;
static void
usage(void)
{
fprintf(stderr, "usage: %s vtno getty-command [arguments] ...\n", argv0);
exit(1);
}
int
main(int argc, char *argv[])
{
struct vt_stat state;
long int tmp;
int tty;
char *end;
argv0 = argv[0];
if (argc < 3)
usage();
if (!isdigit(argv[1][0]))
usage();
errno = 0;
tmp = strtol(argv[1], &end, 10);
if (errno || *end || tmp < 0 || tmp > INT_MAX)
usage();
tty = (int)tmp;
if (!ioctl(STDIN_FILENO, (long)VT_GETSTATE, &state))
if (state.v_active != tty)
ioctl(STDIN_FILENO, (long)VT_WAITACTIVE, tty);
execvp(argv[2], &argv[2]);
fprintf(stderr, "%s: execvp %s: %s\n", argv0, argv[2], strerror(errno));
return 1;
}
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